Transactionmanager isolated

[cforce]

Does your example ensure that any transaction can't span over both datasource's.
I need this approach for a monolith to spring boot microservice migration.

[stephen-masters]

In the example, there is a transaction manager for each datasource, so they are separate. If you wish to support distributed transactions, then I suspect that you would need to introduce something like Bitronix or Atomikos.